11321-ZW9-425ZA Honda CASE, OIL *NH282MU* (Honda Code 8265886). (OYSTER SILVER METALLIC-U)

The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
This Program must be administered as soon as possible. When reporting the repair, use "PI3677" as the Part Number, "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI3677" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
This Revised Service Letter replaces the December 24, 1993 Service Letter. Changes have been made to the Affected Product, Parts Needed, Service Claim Allowances, and Rework Procedure.
Completion Date
June 30, 1994Termination Date
December 31, 1994Problem
The 2W3878 Gear on the crankshaft may be misaligned and the 2P5149 Damper Assembly needs to be replaced on certain 988F Loaders. This Program needs to be performed due to updates and changes in procedures that may have been performed earlier.
Affected Product
Model & Identification Number
Group 1
988F (8YG88-161, 8YG163-193, 8YG196-222, 8YG224, 8YG226, 8YG227, 8YG229, 8YG231-241, 8YG243-248, 8YG250, 8YG254-261, 8YG263, 8YG265-267, 8YG269-273, 8YG275, 8YG276, 8YG278-281, 8YG283-289, 8YG293, 8YG295-303, 8YG305, 8YG307, 8YG309, 8YG311, 8YG313-315, 8YG217-319, 8YG321-323, 8YG325, 8YG326, 8YG329-335, 8YG337, 8YG338, 8YG340, 8YG343-345, 8YG347-351)
Group 2
988F (8YG162, 8YG194, 8YG195, 8YG223, 8YG225, 8YG228, 8YG230, 8YG242, 8YG249, 8YG252, 8YG253, 8YG262, 8YG264, 8YG268, 8YG277, 8YG282, 8YG290, 8YG294, 8YG304, 8YG306, 8YG320, 8YG324, 8YG336, 8YG339, 8YG341)
Group 3
988F (8YG301, 8YG346, 8YG352-359, 8YG361-364, 8YG366-372, 8YG374-381, 8YG383, 8YG384, 8YG386-393, 8YG396, 8YG397, 8YG399-405, 8YG407, 8YG411, 8YG412, 8YG418, 8YG419, 8YG421, 8YG422, 8YG424, 8YG426-428, 8YG430, 8YG433, 8YG434, 8YG437, 8YG443-451, 8YG453, 8YG455-465, 8YG468-473, 8YG476-479, 8YG488, 8YG490-494, 8YG496, 8YG498, 8YG507, 8YG520)
Parts Needed
Dealers will need to order parts for this Program.
Group 1 (Inspection Only)
1 2W1733 Seal Group1 4W8089 Damper AssemblyGroup 2 (And Group 1 If Gear Needs To be Replaced)
1 3F5792 Seal1 5F0149 Ring1 5F3106 Seal1 7F2122 Seal-O-Ring1 5H5672 Ring1 6I3749 Gear Assembly1 4N0933 Gasket1 4N1151 Gasket1 4N1946 Gasket1 4N1998 Gasket2 4N2199 Gasket2 5P5678 M-Seal Stock1 5P5846 Seal-O-Ring1 5P8068 Seal1 5P8119 Seal1 4S5898 Seal-O-Ring1 6V3830 Seal-O-Ring1 6V4314 Seal-O-Ring1 2W1733 Seal Group1 2W3875 Gear1 2W3878 Gear1 4W5599 Gasket1 4W8089 Damper Assembly1 1008178 Gear AssemblyGroup 3
1 4W8089 Damper AssemblyAction Required
See the attached procedure.
Owner Notification
U.S. and Canadian owners will receive the attached Owner Notification.
Service Claim Allowances
Group 1
This is a 4.5-hour job.
Group 2
This is a 28.0-hour job.
Procedures for Group 2 Affected Product require the fabrication of an installation tool. In addition to the straightening tool mentioned above, each dealer may claim 4.0 hours of labor plus a maximum of $50 US for materials to fabricate this installation tool. Only one claim per dealership may be submitted for the fabrication of this tool.
Group 3
This is a 4.0-hour job.
U.S. and Canadian Dealers Only - This Program does not qualify for a Type 2 SIMS Report.
Parts Disposition
U.S. and Canadian Dealers
If the 6I3749 Gear, 2W3875 Gear, 2W3878 Gear and 1008178 Gear are replaced during this rework, return them to the address below:
Caterpillar Inc.
Service Claims Room
Attn. 3400 Vehicular Engine Serv. Engr.
8201 N. University
Peoria, IL 61615
All Other Dealers
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
Attach. (1-Owner Notification) (2-Rework Procedure)COPY OF OWNER NOTIFICATION FOR U.S. AND CANADIAN OWNERS
Rework Procedure
Even if the machine has already been reworked in accordance with the September 24, 1993 Service Letter, PI3660, it still needs to have a new 4W8089 Damper Assembly installed. Also, if the crankshaft gear runout measurement (obtained while performing PI3660) was: - Less than .254 mm (.010 in) - Inspect the alignment of the crankshaft gear again following the updated rework procedures for Group 1, below.
-Between .254 mm (.010) in and .508 mm (.020) - And the gear was repositioned following procedures in PI3660, replace the front gear train following the rework procedures for Group 2.
Greater than .508 mm (.020 in) - Inspect the alignment of the crankshaft gear again following the rework procedures for Group 1, below.
Rework Procedures for Group 1
1. Remove the belts, crankshaft pulley, damper, and front crankshaft seal. Refer to the service manual for the correct tools and procedures for proper removal of the crankshaft seal.
2. Using a depth micrometer or a magnetic base dial indicator, check the distance from the front crankshaft face (where the damper contacts it) to the crankshaft gear. See Illustration 1. Two variables will be measured with this inspection procedure:A. The runout of the front crankshaft gear.B. The depth of the crankshaft gear on the crankshaft.Caution must be used to ensure the stability and accuracy of the tools when performing the inspection procedure (the measuring devices must be anchored firmly). Use of a magnetic base with the dial indicator and the use of a depth micrometer with spacer blocks are examples of accessories used with measuring devices to ensure the stability of the tools.
Measuring Crankshaft Gear RunoutIllustration 1
3. Make twelve (12) measurements equally spaced between every hole of the crankshaft face. Be sure to record all measurements with a special notation for location of the minimum distance and the maximum distance. Calculate the runout of the gear by subtracting the minimum measured distance from the maximum measured distance.4. If the runout measurement is .254 mm (.010 inch) or less, and the gear is within the specified distance from the front of the crankshaft, 27.68 1.27 mm (1.090 .050 in) (refer to Illustration 1), the gear alignment is acceptable. Install a new 2W1733 Seal and a new 4W8089 Damper5. If the runout measurement is greater than .254 mm (.010 in) or the face of the gear is not within the specified distance from the front of the crankshaft, 27.68 1.27 mm (1.080 .050 in), or the gear was repositioned previous